Need help with essentials permissions group manager

I'm running a minecraft server, and I want players to be able to use commands like /spawn and /help without opping them. I've looked on MANY wikis and still, I have no idea how this thing works. i have downloaded group essentials, and I tried to set up the command, but it doesn't work. Here's the permissions I'm using for default players:

groups:
  Default:
    default: true
    permissions:
    - essentials.spawn
    - essentials.helpop
    - essentials.help
    - essentials.rules
    - essentials.list
    inheritance:
    - g:groupmanager_default
    - g:bukkit_default
    - g:essentials_default
    - g:towny_default
    info:
      prefix: '&e'
      build: false
      suffix: ''

For the /help command, add the permissions minecraft.command.help and bukkit.command.help.

For the /spawn command, add the permission essentials.spawn.

If you want, here are the links to 2 wikis that list all the Essentials permissions and all the Minecraft permissions:

Default Minecraft Permissions

Essentials Permissions